Created attachment 3947[details]
Proposed patch
In /classes/submission/sectionEditor/SectionEditorSubmission.inc.php
this check seems to be wrong
// Check if acknowledgement is overdue for CE round 3
if ($dateCopyeditorFinalCompleted && !$dateCopyeditorFinalAcknowledged) return 'highlightCopyediting';
because the $dateCopyeditorFinalAcknowledged is not defined.